@startuml rete
garg2e2_ -> ex1_ 
farg2e2_ -> ex1_
echo_deb_ -> ex1_
ex1_ -> ex1_:is_num
ex1_ -> ex1_:exit_err_ex1_
ex1_ -> ex1_:exit_reg_ex1_
ex1_ -> ex1_:unset_autoargs_ex1_
' {wrap_fn}
' fnn o-> ex1_
' {body_fn}
@enduml